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| Main Authors: | , |
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| Format: | Dataset Open Access |
| Language: | en |
| Published: |
PANGAEA
1988
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| Subjects: | |
| Online Access: | https://doi.org/10.1594/PANGAEA.720987 |
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| _version_ | 1867171357497753600 |
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| author | Staudacher, Thomas Allègre, Claude J |
| author_facet | Staudacher, Thomas Allègre, Claude J |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | We have determined the concentrations and isotopic composition of noble gases in old oceanic crust and oceanic sediments and the isotopic composition of noble gases in emanations from subduction volcanoes. Comparison with the noble gas signature of the upper mantle and a simple model allow us to conclude that at least 98% of the noble gases and water in the subducted slab returns back into the atmosphere through subduction volcanism before they can be admixed into the earth's mantle. It seems that the upper mantle is inaccessible to atmospheric noble gases due to an efficient subduction barrier for volatiles. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_720987 |
| institution | PANGAEA |
| language | en |
| publishDate | 1988 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Noble gas concentrations of oceanic crust and sediments from the Ninety East Ridge in the Indian Ocean Staudacher, Thomas Allègre, Claude J 22-214; 22-216; 52-417D; 52-418A; 66-487; Deep Sea Drilling Project; Dredge; DRG; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Indian Ocean; Indian Ocean//RIDGE; Leg22; Leg52; Leg66; MD34-D2; North Atlantic/CONT RISE; North Pacific/TRENCH We have determined the concentrations and isotopic composition of noble gases in old oceanic crust and oceanic sediments and the isotopic composition of noble gases in emanations from subduction volcanoes. Comparison with the noble gas signature of the upper mantle and a simple model allow us to conclude that at least 98% of the noble gases and water in the subducted slab returns back into the atmosphere through subduction volcanism before they can be admixed into the earth's mantle. It seems that the upper mantle is inaccessible to atmospheric noble gases due to an efficient subduction barrier for volatiles. |
| title | Noble gas concentrations of oceanic crust and sediments from the Ninety East Ridge in the Indian Ocean |
| topic | 22-214; 22-216; 52-417D; 52-418A; 66-487; Deep Sea Drilling Project; Dredge; DRG; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Indian Ocean; Indian Ocean//RIDGE; Leg22; Leg52; Leg66; MD34-D2; North Atlantic/CONT RISE; North Pacific/TRENCH |
| url | https://doi.org/10.1594/PANGAEA.720987 |